A power conversion device connected in parallel to a second power conversion device including power conversion circuitry that performs power conversion by changing a connection state between first multiple lines on a primary side and second multiple lines on a secondary side, baseline selection circuitry that selects one of the second multiple lines on the secondary side as a baseline and partial modulation control circuitry that controls the power conversion circuitry to maintain a state in which the baseline is connected to one of the first multiple lines on the primary side and to change a connection state between other second multiple lines on the secondary side and the first multiple lines on the primary side, wherein the baseline selection circuitry switches a line selected as the baseline based on a switching timing used by second baseline selection circuitry of the second power conversion device to select a second baseline.
Legal claims defining the scope of protection, as filed with the USPTO.
3. The power conversion device according to claim 1, wherein the pulse generation circuitry is further configured to adjust a width of the pulse signal at a timing corresponding to a control cycle synchronized with the carrier wave, and the baseline selection circuitry is further configured to switch the line selected as the baseline at the timing corresponding to the control cycle.
6. The power conversion system according to claim 5, wherein the second baseline selection circuitry of the second power conversion device switches the line selected as the baseline based on a phase of a voltage command value on the secondary side.
7. The power conversion system according to claim 5, wherein the second baseline selection circuitry of the second power conversion device switches the line selected as the baseline based on a phase of a current command value on the secondary side.
12. The power conversion method to claim 8, wherein the second power conversion device switches the line selected as the baseline based on a phase of a voltage command value on the secondary side.
13. The power conversion method to claim 8, wherein the second power conversion device switches the line selected as the baseline based on a phase of a current command value on the secondary side.
15. The non-transitory computer readable medium according to claim 14, wherein the method further comprises instructing acquisition of information about a scheduled timing of the second power conversion device, and the selection further comprises switching the line selected as the baseline when the acquired scheduled timing is achieved.
16. The non-transitory computer readable medium according to claim 7, wherein the method further comprises instructing adjustment of a width of the pulse signal at a timing corresponding to a control cycle synchronized with the carrier wave, and the selection further comprises switching the line selected as the baseline at the timing corresponding to the control cycle.
17. The non-transitory computer readable medium according to claim 14, wherein the method further comprises instructing control of the power conversion circuitry to change the connection state between the second multiple lines on the secondary side and the first multiple lines on the primary side, and instructing switching of a modulation scheme of the power conversion circuitry to either partial modulation or full modulation, and the switching the modulation scheme is based on a timing at which the second power conversion device switches the modulation scheme.
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April 29, 2021
June 13, 2023
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